Multipressure boiler installation



. O. H. HARTMANN- MULTIPRESSURE BOILER INSTALLATION Dec. 2, 1930.

Filed June 5. 1928 3 Sheets-Sheet 'l OTTO H. HARTMANN Dec. 2, 1930.

FIG.4.

o. H. HARTMANN 1,783,842

MULTIPRESSURE I BOILER INSTALLATION 3 Sheets-Sheet 2 Filed June 5, 1928 orm H. mam/mu y. QMMQFQ Dec. 2, 1930. o. H. HARTMANN 1,783,842

MULTIPRESSURE BOILER INSTALLATION Filed June 5. 1928 5 Sheets-Sheet s OTTO H. HARTNANN Patented Dec. 2, 193D "OELTOi 3.1 mm KASSELQWIIQHELMSHO E, Grimm; issrtmommo i, J 1 senmm'r sonm nm ssnnurnensmmsonmr mm B semxmm mm: r q 'EHUNG ,OE'KASfiEIEWILHEPMfiBlQEE,GERMZANSQ r I V i j apparatus foroperating'steainfboiler iristellae tions with twoor more working pressures.

Experi'ence of sirch installations has shown a that zifter o rly a; comparatively shorttime;

.for'exam'ple a." quarter of an ho irj the} case" I of a"t'Wo pres'si11-'e locomotive boi1er,the -high"= pressure section has" attained approximately its fiillpressure, the he'atih'g upofthewater 1'0 and of thefboiler itself thelower-pressure section tekilig consi dei'ebly more time} In thehi'gh-prsjsu-r'e section,ftherefore, steam of very high pressure is ayeg-ilablecomperetive- 1y soon, but nj'most oasescanriot be efictive" 15 1y? utilized.

With such an oheet; f'ageeor' rig" to the 5; er fi e 205 boiler installation of the qluetiofif I steam as it'i'sgeneratedinehigh-pressure see- 1 7 tion; isled through a s'u perheiztter or super i present ihventiomfiiiring the h through eTL the-superheaters, I11 genera1;the

first method of tiro'rliilig is preferable; when the sl iperheater of ehigh pressure se'etibnll ies'f in the hottest Zone of the fine ases, andthe super1j1e'aters of the j next fol l wing pressure sections lie" zones; in whic the flue gases" have enemy been more or lessi reid ieed" in temperature, While theothermethods of working are to. bepreierredi when all the superheeters are arranged in the'same zone 1e 13- a further tam-a e army iimntien that the superheater tubes, can b;e"-kept.,coo1" o'win'g} to the? steam paissiflg through them T (hiring theheating up 'periodi boilers isthus increased.-

of the flue gases as near es Possiblethe;

whole boilrifnstllationiiisisuhstanti'ellyfrefl H reversing chamber, 28,; of the installjati oir The steam from the high pressure' drum, 5',"

which the superheated steam is" led while heatingjupthe lower-pressure boilers Y j owing tof layers of water at difierfit temr Y peretures," are avoided and the life of the ,My inyention is applitzthle with equal d.-

antage both :to stationery" and to? portable" e indirect ge eration of steanq'.

boiler installations and 'ztl'soto the 9 I11 the aocompanyingr'drawings;

show certain; constructional" forms of the",

invention by way of exampleza We Y Figure 1' is a longitudinal section of $13576 pressure.'merine boiler, i

F gll el, r t

gums 3* end 4= show two pecific ariefige-y merits of'the superheater eolfifiections; and l I Figure "5 isle; longitudinal sectionithroiigli" a two-pressure1ocomotive. Ij fthe two-pressure mtri rie hoileffshdwii iii Figures 1f 2,; the, high pfSSHT6 section generetssteam indir'edtlyfbymeans af'ehe at carriercircu'latingf ih-aelosedeyc'le. Insteeidv of the iisuahfurnaee flue, a"tube, systfe'il 1 is provided which is eonneetedi atjitsends-to upper distributor'heecters, 2', 'afn'dto lower e01- lector headers, 3", eri d's'erveis to beet the heat carri 1;,;forexam lewater ors'ome othersl'litabie'ffillidf The "heat 'cerrjep heated" in the tube system, 1 is led fromtfie lipper distributor headers; 2, through theriser tubes;"

4, to the serpentinesor like heating elements; 6; 7 ar anged in the upperjidru 5', where" the high-pressure working steam is generated here the heat cerri r gives' up its Bea-t tethe Water surrounding theserpe 'tiiies arid then flows through the downcornef tribes, T, to the lower c'olleetorhefa'ders; 3, iii order th'e i ce'to r f repeat its circii'leti on' through the tu'b's'yspresentin-v'entiom it be comes, possible to heat up the lower-pifess'u're sections ofthe boiler ifiifiillfifiOIL more rapidv 1y,;s o thatf the time, taken in hesting' u the 136m. l t r .The lbw-pressure p art ofthe boiler inste'l; leti'on is conjstruictedias e smok'e tube hoilejr; 8. 1 TA-lhigh-pressure superheater', 9, ankle lowpres suref superheater, 10,- areierrangedf'ijn the" Figure 2is' across section onthe H'fie li -III 7 seathis pipe being provided at its two ends with the valves, 20 and 21, respectively.

During the heating up of the boiler installation, the valves, 14, 16 and 18, are closed while the valves, 12, 20 and21, are open. In the high-pressure section of the installation, steam is generated in a comparatively short time and is led from the drum, 5, through the open valve, 2, and pipe, 11, to the high-pressure superheater, 9,.from which the superheated steam passes by way of the pipe, 19, and the open valves, 20 and 21, and is blown into the water space of the lowpressure boiler, 8.

It will be seen without further description that in this way the low-pressure boiler, 8, reaches its full working pressure in a considerably shorter time than heretofore and consequently the time required for heating up the whole installation is substantially reduced. v

The valves, 20 and 21, may either be opened and shut by hand, or they may] be' of the automatic type responsive to the pressure or temperature conditions in the high and lowpressure boilers in a well known manner; for example, the valves may open on the attainment of a predetermined, pressure in the high-pressureboiler and close when the full working pressure in the low-pressure boiler is reached.

Itwill be obvious that my invention can also be applied to boiler installations in which the steam is directly generated in the high-pressure section or indirectly generated in the low-pressure section, and also to installations having more than two boiler sections working at difierent pressures.

As pointed out above, in addition to the reduced time taken in heating up, the superheater tubes are efficiently cooled by the steam passing through them. I

If the superheaters of the different pressure sections lie in the same temperature zone of the flue gases and particularly in the case where they lie as close as possible to the furnace, it is preferable when raising steam to pass the high-pressure steam through the superheaters of'all the pressure stages as shown, for example, in Figures 3 and 4.

1n the example according to Figure 3, in order to pass the steam in series through the superheaters, 9 and 10, a connecting pipe, 22, fitted with a shut-off valve, 23, is provided between the superheated-steam delivery pipe,

13, from the high-pressure superheater, 9, and the steam pipe, 15, to the low-pressure superheater, 10.

1n the example according to Fi ure 4, the steam from the high-pressure boiler, on the other hand, passes through the two superheaters, 9 and 10, in parallel. This is effected by a connecting pipe, 24, with shut-oil valve, 25, between the steam. .inlet pipe, 11, to the high-pressuresuperheater, 9, and the steam inlet pipe, l5,to the low-pressure superheater, 10. In addition, the pipe, 19, with valve, 20,

"from the superheated-steam delivery pipe,

13, of the high-pressure superheater, 9, to the low-pressure boiler, 8, isco'nne'cted by the pipe, 26, fitted with shut-off valve, 27, to the superheated-steam delivery pipe, 17, from the low-pressure superheater 10.

Figure 5 shows the application of the invention to a two-pressure boiler system for locomotives, in which the low-pressure section, 8, is constructedas a longitudinal boiler in the usual way while the fire box, 29,10rms the high-pressure section of the installation, the walls of this high-pressure fire-box constituting the tube system 1, of the heat carrier, which generates the high-pressure working steam in the upper drum, 5, as'described the pipe, 17, from the superheater, 10. This steam mixture is led through a pipe, 34, to the low-pressure cylinder, 31, from'which it passes through the conduit, 35', to the blast pipe, 36. The numeral, 37, indicates a feed water pump which takes a portion of the water contained, in the low-pressure boiler, 8, through a pipe, 38, and delivers such Water as feed water to the high-pressure drum, 5, through a conduit, 39.

I declare that what I claim is v 1. Method of initially heating up multipressure boiler, installations having superheating devices for superheating the steam generated in the respective pressure sections of the boiler, which consists in leading steam generated in a high-pressure section of the boiler installation through a superheater heated by the same furnace as the boiler itself and'thence to the water space of a low-pressure section of the boiler installation.

2. Method of initially heating up multipressure boiler installations having superv heating devices for superheating the steam generated in the respective pressure sections of the boiler, which consists in simultane- .ously supplying heat to at leasttwo pressure sections of the boiler, and leading steam gens erated in a highspressure section of the boiler installation through a superheater heated.

by the'same furnace as the boiler itselfandr thence to the water space of a low pressurei section ofthe boiler installation. 7

3. Meth d asset forth in claim 1 wherein steam from ahigh-pressure section is led through the superheatersof all the pressure stages;

vices for superheating the steamgenerated in the respectlve pressure sectionsof the boilerlinstallatioma delivery pipeleading vices for superheating the steam generated-'1' in the respective pressure sections of the from a high-pressure superheater'heated by; the same furnace as the boiler itself, and

means for conducting steam from saidhighpressure superheater to a low-pressure section of the boiler installation.

5. In combinationwith a multi-pressure boiler installation having superheating deboiler installation, means for conducting steam from sald'superheatlng. dev ces to a low-pressure section of the 'boi lerinstallar tion.

- 6. In combination with a multi pressure I boiler installation having superheating de-' vices for superheating the steam generated 1n the respective pressure sectlons-of the boiler installation, delivery pipes ,leading from said superheating devices, and atleast one conduit provided with shut-ofi fjvalves leading from a delivery pipe toithe water space of a low-pressure section of the boiler installation. l r

7. In combination with a multi-pressure V steam plant having superheating devices for superheating thesteam produced in the re- V spective pressure sectionsof the boiler in-m stallation, adelivery pipe leading from a w high-pressure superheater, a'steam'inlet pipe between said high-pressure superheater and a h1ghpres'sure bo1ler,'a low-pressure steam inlet pipe to a low-pressure superheater a low-pressure steam delivering pipe from-said superheater, a connecting pipe between said high-pressure delivery pipe and said lowpressure inlet pipe, a shut-off valve insaid connecting pipe, and a branch pipe provided with shut-off valves leading from said low pressure delivery pipe tothe water space of a'low-pressure boiler.

In testimony whereof IafliX my signature. i

OTTO H. HARTMANN;

V combination with a multi -pressure .i boiler installation having superheating de 

